[Elecraft] K3 PTT -- done!

[Dave G4AON]

I seem to be missing the point of this PTT CW keying thing... Is it for 
transverter/linear/mast head pre-amp use on VHF/UHF?

A useful feature that was mentioned a long time ago (and put on the back 
burner I think), was adding a programmable transmit feature to one the 
"PF" buttons to give a carrier for linear/ATU tuning. I have this 
feature on my Kenwood TS-480 and find it invaluable. Pressing thw 480's 
PF button toggles a carrier on and off (regardless of mode), the carrier 
level can be adjusted while it's transmitting via the normal power 
setting route and can be set anywhere from 5 to 100 Watts in one Watt 
steps (the power setting limits of the 480). The power level is stored 
and occurs regardless of the main power level setting, so for example if 
I'm set for 5 Watts of QRP CW, pressing the button gives me 10 Watts for 
the external MFJ auto ATU. If I'm using my valve linear and have the 480 
set at 25 Watts on SSB, pressing the PF button gives me 10 Watts to tune 
the linear with. This is similar, if not the same functionality, as 
those external 3rd party button boxes do for the Yaesu FT817/857/897 rigs

Has this use of one of the three PF buttons been included yet?

73 Dave, G4AON